【作者】 王志刚；

【导师】 魏修亭； 李志永；

【作者基本信息】 山东理工大学 ， 工程硕士（专业学位）， 2017， 硕士

【摘要】 为解决轮胎模具粘胶、腐蚀、积碳、易磨损、难清洗等问题,通常在轮胎模具表面喷涂Teflon涂层。但是,Teflon涂层的硬度较低,耐磨性差,需要定期重复喷涂。类金刚石涂层(DLC)作为一种新型功能涂层材料,具有高硬度和高弹性模量、耐磨损、高结合强度等优点,具有应用在轮胎模具表面的潜力。因此研究轮胎模具DLC涂层代替Teflon涂层,解决Teflon涂层的硬度较低、耐磨性差这一难题,具有重要的现实意义。为探究DLC涂层在轮胎模具上应用的可行性,本课题主要进行了以下几个方面的研究:(1)加工并制备了基体试样,并在试样上沉积了含氢DLC、无氢DLC和Teflon涂层。按照轮胎模具加工工艺制备35#钢基体试样,Teflon涂层完全按照轮胎模具涂层的工艺喷涂,含氢DLC、无氢DLC涂层分别采用等离子体增强化学气相沉积和电弧离子镀沉积。(2)对含氢DLC、无氢DLC和Teflon涂层的结构、成分和表面形貌进行了分析和比较。三种涂层具有不同的粗糙度、断面结构、元素组成,而不同的成分、结构会对涂层的表面性能造成不同的影响,因此对三种涂层的结构、成分进行表征,为涂层表面性能的改进提供理论依据。结果表明,两种DLC涂层粗糙度均小于Teflon涂层的粗糙度,三种涂层结构均匀致密,无明显的沉积裂纹产生。(3)对含氢DLC、无氢DLC和Teflon涂层的表面性能进行了测量与比较。对三种涂层的疏水性、纳米硬度、弹性模量和结合强度进行测量,分析三种涂层性能的优劣并对DLC涂层在轮胎模具上的应用性进行评价。结果表明,DLC涂层在粗糙度较小的情况下,其疏水性能低于Teflon涂层。但是增加DLC涂层的粗糙度,其疏水性能也显著增加,当涂层粗糙度为754nm时水接触角达到最大96o。无氢DLC、含氢DLC涂层硬度、结合强度均大于Teflon涂层。通过对DLC、Teflon涂层结构、成分、表面形貌和主要表面性能的对比研究可以得出:DLC涂层疏水性、硬度、结合强度均可满足轮胎模具的使用要求,DLC涂层可以应用于轮胎模具。更多还原

【Abstract】 In order to solve the problems such as sticking rubber,mold corrosion,carbon deposition,poor wear resistance and difficult cleaning of the tire mould,Teflon coating is usually sprayed on the surface of tire mold.However,the hardness of Teflon coating is low,the wear resistance is poor,it need to be repeated spraying.DLC coating as a new functional coating material,it has high hardness,high elastic modulus,abrasion resistance,high bonding strength and other advantages,it has the potential to be applied on the surface of the tire mold.Therefore,studying the DLC coating takes the place of Teflon coating on tire mold,solving the problem of low hardness and poor wear resistance of Teflon coating,which has great realistic significance.In order to explore the application feasibility of DLC coating on tire mold,the paper mainly study the following aspects:(1)The specimens were prepared and processed,hydrogen containing DLC,hydrogen free DLC and Teflon coatings were deposited on the specimens.According to tire mold technological processes prepared 35# steel matrix specimen,Teflon coating is completely sprayed in accordance with the process of tire mold coating,Hydrogen containing DLC and hydrogen free DLC coatings were deposited by plasma enhanced chemical vapor deposition and arc ion plating.(2)The characterization of three kinds of coatings,such as the structure,composition and surface morphology,were analyzed and compared.Three coatings have different roughness,cross section structure and element composition,different components and structures have different effects on the surface properties of the coatings.Therefore,the structure and composition of the three coatings were characterized,to provide theoretical basis for improving surface properties of the coatings.The experimental results show that the roughness of two kinds of DLC coating is less than that of Teflon coating,three kinds of coatings have uniformly dense internal structure,there is no obvious deposition crack.(3)The surface properties of three kings of coatings were measured and compared.In paper,the main properties of three kinds of coatings,such as the hydrophobicity,nano hardness,elastic modulus and bonding strength,were quantitatively analyzed.The strengths and weaknesses of the three kinds of coatings were compared.The experimental results show that when the DLC coating’ roughness is smaller,the hydrophobicity was lower than that of Teflon coating.However,with the increase of roughness,the hydrophobicity of the coating increased gradually.When the roughness of DLC coating is 754 nm,the water contact angle of coating achieves 96o.The nano hardness and bonding strength of two kinds of DLC coatings were much higher than that of Teflon coating.Through the comparative study of the structure,composition,surface morphology and main surface properties of the DLC and Teflon coatings,it can be concluded that: The hydrophobicity,nano hardness and bonding strength of DLC coating can meet the application requirements of tire mold,it can be applied on the tire mold.更多还原